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Vaishnavi Mishra posted an Question
January 08, 2022 • 08:48 am 30 points
  • IIT JAM
  • Mathematics (MA)

How to solve this

how to approach this problem plz explainnnnnnnnnnnn

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    Navdeep goyal 1

    maximum possible order is LCM of prime factor n=6 maximum possible order LCM(3,2,1)=6 so wrong n=8. maximum possible order LCM(3,5)=15 so wrong n=9 maximum possible order LCM(7,2)=14 so wrong n=10. maximum possible order LCM(3,7)=21 so right

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    n = 9 is the answer LCM (5,4) =20

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    4 is not prime

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    but the order is more than 2n

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